Hybrid Corn CH129909 Breeding Segmentation
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Solution Overview
Problem
Corn breeding techniques face challenges in developing uniform hybrid varieties with desirable traits such as high yield, disease resistance, and uniform germination due to genetic non-uniformity and unpredictability in cross-pollination, requiring the development of stable inbred plants and specific breeding methods.
Innovation Solution
The development of the hybrid corn variety CH129909, which includes genetic loci for traits like male sterility, herbicide resistance, and disease resistance, using cytoplasmic-male sterility and genetic transformation techniques to introduce desired traits, and tissue culture methods for regenerating plants with consistent physiological and morphological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination breeding methods are used to combine desirable traits, then genetic diversity and trait combination are improved, but genetic uniformity and predictability of the hybrid population deteriorate
Solution Approach 1:
The breeding process is segmented into distinct phases: first developing homozygous inbred parent lines through self-pollination to ensure genetic uniformity, then crossing these standardized parents to produce uniform hybrid F1 progeny. This segmentation allows each phase to optimize for its specific goal without compromising the other.
Solution Approach 2:
Homozygous inbred parent plants are developed and standardized through multiple generations of self-pollination and selection before the actual hybrid crossing. This preliminary action ensures that when cross-pollination occurs, both parents have uniform, predictable genotypes, which guarantees uniformity in the hybrid offspring.
2Stability of the object's composition
If self-pollination is used to develop uniform inbred lines, then genetic uniformity and stability are improved, but genetic diversity and ability to combine traits deteriorate
Solution Approach 1:
The patent merges two opposing pollination methods: self-pollination is used to develop uniform inbred parent lines, while cross-pollination is used to combine desirable traits from different parent lines. By merging these approaches in sequence, the patent achieves both genetic uniformity (in the F1 hybrid) and trait combination (from diverse parents).
Solution Approach 2:
Homozygous inbred lines serve as intermediaries that bridge the gap between genetic diversity and uniformity. These inbreds are created through self-pollination to capture genetic diversity, then standardized for uniformity, and finally used as parents in cross-pollination to produce uniform hybrids with combined traits.
3Adaptability or versatility
If traditional breeding populations are used to develop hybrids, then broad genetic base is improved, but uniformity of hybrid progeny deteriorates due to genetic heterogeneity
Solution Approach 1:
The patent changes the genetic parameter of the parent plants from heterozygous (in breeding populations) to homozygous (in inbred lines). This parameter change ensures that when cross-pollination occurs, the resulting F1 hybrids are genetically uniform while still incorporating the broad genetic base from the original breeding populations through the inbred development process.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH129909. The invention thus relates to the plants, seeds and tissue cultures of the variety CH129909, and to methods for producing a corn plant produced by crossing a corn plant of variety CH129909 with itself or with another corn plant, such as a plant of another variety. The invention further relates to genetic complements of plants of variety CH129909.